Heat-regulator.



L. A. ABBOTT. HEAT REGULATOR. hAPPucATmw FILED MAR. 31, 190B.

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ATTORNEY L. A. ABBOTL;

HEAT REGULATOR. APPLICATION FILED MAR. 31, 1908.

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WITNESSES:

nvvsmmm W1 Q41 a; I l M (j ATTORNEY lIiAW'EENOE AEBl-BWLH'E, GillClI-HCAtE-O, ILLINOIE.

4 specification of Letters Patent.

Application filed March 31, 190$.

To all whom it may concern:

Be it known that I, LAWRENCE A. Anno'rr, a citizen of the United States,residing" in the city of Chicago, in the county of (look and State ofIllinois, have invented a certain new and useful Heat-Regulator, ofwhich the following is a specification.

My invention relates to that class of devices which is desired tocontrol the admission of a heating fluid to a radiator by thetemperature of the room in which the radiator is located, and is moreparticularly designed for use in those buildings in which the so-calledvacuum system of heating is employed, it being so designed that it maybe attached to the vacuum side of the radiator,

and has for its object to provide certain improvements in constructionand operation of the same as will be hereinafter more definitely pointedout and claimed, reference being had to the accompanying drawings inwhich- Figure 1, is a view of a room or apartment having my improvedinvention installed therein.

Fig. 2, is a detailed view of my improved fluid pressure valve. Figs. 3,4t, 5, and 6, are detail views of my improved t rmostat, and the methodof attaching it the wall.

reference numerals refer to similar parts throughout the entiredescription.

In the drawings: 1 is the radiator which is provided, at one end, withsuitable pipe conhections 2 leading to a source of supply 35.

(not shown) of the heating medium, 4; is the vacuum valve which issuitably connect ed to a radiator; 5 is my improved fluid pressure motorwhich is formed, as better shown in the detailed view, with motorchamber 6, at the top, in which is located the motor diaphragm 7. Thisdiaphragm has secured to its upper surface a block 8, of wood or othersuitable materiai, and a flanged casting 9 is fitted to the lower sideof the wood in the center thereof, the flange of the casting 9 engaging;the scent face of the diaphragm and it is held in position by means ofscrews 10, or any other convenient term of fastening. An internallythreaded opening 11 is provided in the central portion of the flangedcasting 9 and has secured thereto a valve in t2 the end of which isprovided. With'throads f.

ting'to and coincidins with the threads in the flanged casting. lock nuti3, any other convenient to for ice nag the valve Patented Apr, 2%, ltd.

5erial No. 4%,352.

stein in position, may be used. The lower end of the stem carries avalve 14 adapted to engage the valve seat 15. It is well known thatthese valves give considerable trouble by reason of wear, and it is aconsiderable source of annoyance to engineers that they have todisconnect the entire pipe connections in order to remove the valve forthe purpose of putting in a new valve, or of grinding the old one intoits seat. My valve casing 17 is coi'lstructed with an opening 16 in thebottom thereof of slightly larger diameter than the valve, the openingbeing provided with a plug 18, which may be provided with a shoulder towhich a wrench may be attached or may be slotted for a screw driver. Itis obvious from the above description that all that it is necessary todo in making a repair of this valve is to remove the plug 18, loosen thelock nut 13, and by unscrewing the valve stem, it can be taken outthrough the bottom of the valve casing without breaking a single joint.A coil spring 19 is located in the upper part of the chamber 6 andexerts a. pressure against the upper side of the block 8. The upper partof the motor chamber 6 is connected by means of suitable pipeconnections 20 to the interior-of my improved thermostat 91, which isconstructed, as better shown in the detail views, of a base 22, which isprovided with lugs 23 and 24, a passage 31 being provided in the lug 23which leads to the interior of the thermostat 21. Suitable pipevconnections 32 lead from the opening 29 to the vacuum side of theradiator.

It may he found desirable in practice to iocate a check valve 33 betweenthe connection with the vacuum pipe 34 and the ther inostat A. passage35 leads through the lug to a chamber 3% formed in the base 22 oi? thethermostat 21. This chamber 36 is provided with internal threads and hasmounted in its inner end a plug 37 which is;

slotted as at,38 to provide for screwdriver adjustment. An opening 39 isprovided through the screw-threaded plug 37 afi'ording a passage theinterior of the thermostat. A pipe plug 4:0 is titted to the oppositeend of the chamber 36 and efi'ec ally seals it from the atmosphere. Atthe is time it is obs lb by the removal the plug 4-0 it is poss ble toregulate the position of the I? with a eat degree of nicety. A

-11, someanat similarto the chamis provided with a plug 42, similar tothe plug 3'2", itbeing provided with an opening d3 through its center. Apipe plug si l, having a minute orifice 5 through. its center, isprovided at the outer extremity of the chamber ell, the orifice leadingto the exterior of the thermostat 21. Cotton, or other suitablematerial, may be located in the chamber ll, to cleanse the air as itenters from the atmosphere to the interior of the thermostat. Thethermostat is provided with a metal band 46, which is secured to a valve52, which is mounted upon a pin or pivot 53 and swings thereon. Coilsprings 5% may be provided to take up the extra pull, it necessary. Thelower end 55, of the valve 52, operates to open and close the openings39 and 4:3. A cap 56 is threaded upon the base 22, packing 5? beingprovided therebetvveen, in order to make a tight joint. The base 22 issecurely attached to the casting 27, by means of screws 58, packings 59and 60 being provided Where the lugs 23 and 24 en ter the recesses 25and 26. This makes it ex tremely convenient to remove the thermostat andmake any necessary adjustments.

The operation of the device is as follows:The iiuid pressure motor 5 isnormally in the position shown in the drawings. "When the wmperature hasraised to a predetermined point the metal band 46 expands, carrying withit the arm 50, which, in turn, moves the valve 52 away from the opening39, and will cause it to close the opening e3. Since the opening 39 isconnected by the pipe connections 32 to the vacuum side of the radiator,it naturally :i'c ilows that the air contained in the interior of thethermostat is almost instantly exhalusted, and the vacuum operates todiaw ne rly, if not all, of the air out of the pipe 20gand the upperpart of the motor chamber 6. This removes the atmospheric pressure from.the top of the motor diaphragm 7, and it follows that it is forcedupward by reason of the pressure of the atmosphere upon its other side,with the result that the valve 14 is raised and is socurely, seated uponits seat 15. As soon as the temperature fails it is obvious that themetal band will contract 'and, actihg through the medium of the arm andthe valve 52, will move the of the valve 52 away from the opening 43 andcause it to close the opening 39. This admits the air through theorifice a5, and the acuum being re lieved, the pressure upon each sideof the diaphragm 7 is equal, with the result that the coil spring 19exerts a pressure suilicient to move the valve stem downwardly, and inturn the valve Ll away from its seat 15, thus permitting the inflow ofthe heating medium to the radiator. The movement of the valve 52 underthe thermostatic action of band 46 in uncovering opening 39 and closingop'ening 4.3, shuts oilingress of air to the interior ofthe thermostatthrough openings 43 and 45, thereby sealing pipe 32 from the atmosphere,so that the constant vacuum in the return pipe 3 will maintain itssuction on the radiator 1. while the valve It is being operatedby saidvacuum to seat at 15. It follows, therefore, that by reason of thisclosing of opening 43 as the opening 39 is uncovered, the action of thevacuum in pipe 34 on the radiator l is uninterrupted.

It will be obvious from the above description that my improvement may beattached "to any and all heating systems employing the vacuum system,and it becomes possible with a very slight change to provide for aregulation of the inflow of the heating medium by the temperature of theroom without having recourse to electricity, with its attending sourcesof annoyance, or without the use of compressed air with its expensivepipings, etc., including the maintenance of an air compressor.

Many changes may suggest themselves to persons skilled in the art whichwill fall within the scope of my invention, as claimed.

Having described my invention, what I regard as new and desire to secureby Lcttors Patent, is

In a heat regulator for vacuum systems, the combination with a radiator,of a supply pipe on one side thereof, a single vacuum re turn pipe onthe opposite side in constant communication with said radiator: andthrough which the air and water of condensation pass, a valve in saidsupply pipe, a fluid pressure motor for controlling said valve operatedthrough the vacuum, and thermostatically operated means for controllingthe communication of the vacuum pipe with said motor, said meansoperating, as it opens said motor to the action of the vacuum pipe, toseal said pipe from the atmosphere without interrupting thecommunication of said vacuum pipe with the radiator.

LAWRENCE A. ABBOTT.

Witnesses V. B. Romans, E. H. Lror-irmvcunc.

